Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    13
    Going through FP1 really quickly for the first time on me ones so idk whether I'm being stupid or if the textbook has a misprint

    Parametrics given as X=ct and y=c/t so standard coordinates should be P(ct,c/t) right? The book says P(ct^2,c/t) and continues to use it within examples?
    Offline

    2
    ReputationRep:
    (Original post by RonnieRJ)
    Going through FP1 really quickly for the first time on me ones so idk whether I'm being stupid or if the textbook has a misprint

    Parametrics given as X=ct and y=c/t so standard coordinates should be P(ct,c/t) right? The book says P(ct^2,c/t) and continues to use it within examples?
    Can you post a photo?
    • Thread Starter
    Offline

    13
    (Original post by BarryBeTrippin)
    Can you post a photo?
    Name:  image.jpg
Views: 76
Size:  426.9 KB
    Am I being stupid and missing something?
    I was thinking its a misprint cause last chapter is parabolas where X=at^2?
    Offline

    2
    ReputationRep:
    (Original post by RonnieRJ)
    Name:  image.jpg
Views: 76
Size:  426.9 KB
    Am I being stupid and missing something?
    I was thinking its a misprint cause last chapter is parabolas where X=at^2?
    Yeah it's an error my book has the coordinates at (ct, c/t)
    • Thread Starter
    Offline

    13
    (Original post by BarryBeTrippin)
    Yeah it's an error my book has the coordinates at (ct, c/t)
    Ah ok thank youuu
    Offline

    22
    ReputationRep:
    (Original post by RonnieRJ)
    Going through FP1 really quickly for the first time on me ones so idk whether I'm being stupid or if the textbook has a misprint

    Parametrics given as X=ct and y=c/t so standard coordinates should be P(ct,c/t) right? The book says P(ct^2,c/t) and continues to use it within examples?
    Mistake in the textbook, a quick check in your formula booklet will confirm this.
    Offline

    3
    ReputationRep:
    (Original post by RonnieRJ)
    Name:  image.jpg
Views: 76
Size:  426.9 KB
    Am I being stupid and missing something?
    I was thinking its a misprint cause last chapter is parabolas where X=at^2?
    You're right - it's ct, not ct^2.
    • Thread Starter
    Offline

    13
    (Original post by Zacken)
    Mistake in the textbook, a quick check in your formula booklet will confirm this.
    Ooh didn't realise this was given in the formula booklet

    Thank you!
    Offline

    2
    ReputationRep:
    Lol are u working on the floor??
    • Study Helper
    Offline

    16
    ReputationRep:
    Study Helper
    (Original post by RonnieRJ)
    Name:  image.jpg
Views: 76
Size:  426.9 KB
    Am I being stupid and missing something?
    I was thinking its a misprint cause last chapter is parabolas where X=at^2?
    You have to trust your judgement on this - you want a cartesian equation xy = c^2 and the book's version doesn't work with the coordinates they've given so you are right
    • Thread Starter
    Offline

    13
    (Original post by davros)
    You have to trust your judgement on this - you want a cartesian equation xy = c^2 and the book's version doesn't work with the coordinates they've given so you are right
    Yeah I checked it with the Cartesian form but then I wondered if the equation they gave was wrong!
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    What's your favourite Christmas sweets?
    Useful resources

    Make your revision easier

    Maths

    Maths Forum posting guidelines

    Not sure where to post? Read the updated guidelines here

    Equations

    How to use LaTex

    Writing equations the easy way

    Student revising

    Study habits of A* students

    Top tips from students who have already aced their exams

    Study Planner

    Create your own Study Planner

    Never miss a deadline again

    Polling station sign

    Thinking about a maths degree?

    Chat with other maths applicants

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.